<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app" class="app1">
        {{message}}
    </div>
       <!-- 开发环境版本，包含了有帮助的命令行警告 -->
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script>
    var app=new Vue({
        // el:"#app",
        el:".app1",
        data:{
            message:"零基础,学挨踢,就到黑马程序员"
        }
    })
</script>
</body>
</html>